HBasicBlock::CreateSimulate argument name clarity

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 78490db11a2a3dd9afef91272ecc42530426adcd..26d01c1b6586c8799eda7c1d16c9b8f17c57d365 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -116,14 +116,14 @@ class HBasicBlock: public ZoneObject {
 
   bool HasParentLoopHeader() const { return parent_loop_header_ != NULL; }
 
-  void SetJoinId(int id);
+  void SetJoinId(int ast_id);
 
   void Finish(HControlInstruction* last);
   void FinishExit(HControlInstruction* instruction);
   void Goto(HBasicBlock* block, bool include_stack_check = false);
 
   int PredecessorIndexOf(HBasicBlock* predecessor) const;
-  void AddSimulate(int id) { AddInstruction(CreateSimulate(id)); }
+  void AddSimulate(int ast_id) { AddInstruction(CreateSimulate(ast_id)); }
   void AssignCommonDominator(HBasicBlock* other);
 
   void FinishExitWithDeoptimization(HDeoptimize::UseEnvironment has_uses) {
@@ -156,7 +156,7 @@ class HBasicBlock: public ZoneObject {
   void RegisterPredecessor(HBasicBlock* pred);
   void AddDominatedBlock(HBasicBlock* block);
 
-  HSimulate* CreateSimulate(int id);
+  HSimulate* CreateSimulate(int ast_id);
   HDeoptimize* CreateDeoptimize(HDeoptimize::UseEnvironment has_uses);
 
   int block_id_;
@@ -694,7 +694,7 @@ class HGraphBuilder: public AstVisitor {
 
   // Adding instructions.
   HInstruction* AddInstruction(HInstruction* instr);
-  void AddSimulate(int id);
+  void AddSimulate(int ast_id);
 
   // Bailout environment manipulation.
   void Push(HValue* value) { environment()->Push(value); }